Nail machine



J. B. PRIESTHOFF.

NAIL MACHINE. APPLICATION FILED NOV-'17, 192p.

PatentedSept. 5, 1922?.

2 SHEETS-SHEET I.

I N V EN TOR. Je'wm 5 IE/557% FF.

A TTOR NEY.

- a citizenof the United States, residing Patented Sept. 5, 1922.

UNITED STATES PATENT;

OFFICE.

mm B. riunsrnorr, or xo oMo, INDIANA, nssrenon or ONE-HALF To GEORGE WILKEN, or LATONIA, KENTUCKY.

NAIL MACHINE.

Application filed November 17, 1920. Serial No. 424,727. i

To aZZw/tom it may concern:

- Beit known that I, JOHN B. Pmnsrrrorr, at

Kokomo, in the county of Howard and State of Indiana, have invented certain new and useful Improvements in Nail Machlnes, of

which the following is a specification.

This invention relates to nail machines of the class adapted to construct nails from a strand'of wire, one feature of the invention being the provision of adjustably mounted dies for gripping and holding the wire while it is being cut into lengths and a head is being formed thereon, means being provided for automatically feeding the wire length-wise between the dies and for straightening the wire. before it is entered between the dies.

A further feature of the invention is the provision ofpivotally mounted cutting dies so constructed that the nail will be pointed and stockprovided for forming a head on the nextsucceeding nail, automatically operated means being provided for swin ing the cutting dies-inwardly for severing tie wire and forming the pointed end of the nail.

A further feature of the invention is the provision of an automatically operated plunger for forming ahead on each succeeding nail before the nail is severed from the strand of wire.

A further feature of the invention is the provision of means for positively operating the wire holding dies for moving one of said dies into or out of operative position, adjustable means being provided in connection therewith for varying the stroke of the movable portion of, the die.

, Other objects and advantages will be hereinaftersmore fully set forth and pointed out in the accompanying specification.

In the accompanying drawings which are made a part of this application,

Figure 1 is a top plan view of the machine, I

'Figure 2 is a sectional view' thereof seen on line 22 Figure 1,

Figure 3 is a detail elevation of the wire holding dies as seen from line 3-3 Figure 2 Figure 4 is an elevation of the cutting dies as seen from line 4--4 Figure 2, and

Figure 5 is a detail sectional view as seen on line 5--5 Figure 1.

Referring to the drawings in which similar reference numerals sponding parts throughout the several views, 1 indicates the body of the machine from which depends supporting legs 2, said parts being constructed in any preferred manner. Formed through the body or platform 1 is is a head block 4, t e inner face of which is provided witha dovetail slot 5, and in said slot is positioned a frame 6, said frame containing die blocks 7 in which are mounted companion gripping dies 8 and 9, the die 8 being stationary and the die 9 movable. The die blocks 7 are held in adjusted position within the frame through the medium of an adjusting screw 10. The meeting ends of the ripping dies 8 and 9 are provided With su stantiallysemi-circular recesses 11 through which the wire 12 from which the nails are formed passes, the semi-circular recesses being so constructed that the dies.

designate corre-v The head is formed on the nail prior to the severance of the nail from the len wire 12, and this is accomplished by slidably mounting a plunger 13 on the platform 1 and at the opposite edge of the opening 3 from the head block 4, theinner end of the plunger having a mandrel 14 adjustably mounted therein which moves with the plunger and strikes the end of the nail 'orming WlIe and upsets the end of the wire and forms the head for the nail. The plunger 13' is moved back and forth through the medium of an eccentric 15, said eccentric being connected with the plunger through the medium of an eccentric arm 16, and as the said eccentric is mounted upon the crank portion 17 of a shaft 18 the rotation of said shaft will cause the plunger to travel towards and from the gripping dies 8 andv 9. The shaft 18 is mounted in suitable bearings 19 extending upwardly from the of the shaft havingdrivmg pulle s 20 thereon and also a balance wheel 21. n severing the nail ,from the remainder of the wire 12, cutting dies 22 are used which are mounted latform 1, one end in the holding blocks 23, and these blocks are provided with lateral extensions 24, which in turn enter notches 25 in brackets 26, the blocks 23 being locked in engagement with the brackets 26 by locking bolts 27. The dies 22 are adjusted with respect to the die blocks 23 and are held in their adjusted position by means of adjusting screws 28 and 29.

Depending from the under face of the body 1 and at one edge of the opening 3 is a ledge 30, and through said ledge extends a pivot pin 31 upon which are pivotally mounted pairs of arms 32 which support frames 33, the base of the brackets 26, as well as the lower edges of the die blocks 23, resting upon the supporting frames while the brackets are held in adjusted position on the supporting frames by forming extensions 34 on the brackets which are in the nature of hooks and fit over the upper arm 32 of the supporting frame, said extensions having threaded eyes '35 for the reception of screws 36, said screwsalso passing through stationary eyes 37' on the arms 32, conse: quently when the screws 36 are rotated the brackets 26 and parts associated therewith will be moved towards or from the pivot pin 31. The supporting frames 33 and arms carrying the same, extend outwardly at an angle to a line through the longitudinal-center of the frame and thereby disposes the cutting dies on opposite sides of the path of the wire 12, said dies and supporting brackets carrying the same being swung inwardly towards each other when the wire is cut in two and the nail formed. The inwardly swinging movement of said supporting frames and cutting dies is controlled from the shaft 18, eccentrics 38 being attached to the shaft 18 and each having a rod 39 which is pivoted to a block 40 slid-ably mounted upon parts of the base 1, the free ends f said blocks having rollers 41 which contact with theouter faces of the arms 32 and as the faces of the arms contacted by the rollers are at an angle and the'rolfcrs travel in a straight line, the outward or forward movement of the blocks 40 will swing the free ends of the arms and supports inwardly and with sufficient pressure to cause the cutting dies to sever the wire 12. The ends of the cutting dies 22 are so shaped that the nail when severed from the wire will be pointed, the incision in cutting the wire leaving a sufficient amount of stock at the end of the wire to form a head for the next succeeding nail, when the mandrel 14 is driven against'the end of the wire. The arms 32 and the supporting frames 33 are swung outwardly when released by the rollers 41 b any suitable means, such as a spring 42. The gripping die 9 is moved towards or from the gripping die 8 for engaging or releasing the wire 12, the inward outward swinging movement of the arm 45,

and may be used for positioning the arm at various distances from the end of the rocking lever. The rocking lever 46 is caused to pivot on the standard 47 and thereby move the pivoted end of -said lever,towards or from the movable gripping die 9 through the medium of a cam wheel 49 which is mounted upon the shaft 18, the lever 46 having trunnions 50 thereon which travel on opposite sides of the cam wheel, and as the cam wheel rotates thelever 46 will be positively rocked back and forth on its pivot.

Any suitable means may be provided for moving the die 9 outwardly, but in this instance a wire 51 is secured at one end to the outer. end of the die 9 and the opposite end thereof to a spring arm 52, the tension of the spring arm pulling the die outwardly as the pivoted end of the lever 46 moves away from the die 9. In addition to the bolts 44 and 48 for adjusting the'position of the free end of the arm 45, the outward movement of said arm may be limited by extending a bolt 53 through a stud 54 and in position to engage the face of the arm 45 adjacent its free end, the stud being fixed to the body 1.

The wire 12 is intermittently fed between the gripping dies 8 and 9 by passing the wire 12 between the gripping blocks 55 and 56, the block 55 being normally stationary while the block 56 is movable, the latter block being carried by an arm 57 projecting from one end of a plate 58, said plate having an elongated slot 59 therein through which projects a stud 60. The plate 58 is mounted upon a standard 61, the face of thestandard adjacent the wire extending at an angle to the trend of the wire, and the face of the gripping block 08, co-operating with the tapered face of the standard 61, is tapered coincident to the face of the. standard, consequently when the plate 58 is manually moved in one direction the block 56 will be moved away from the wire 12. The plate 58 and the block 56, carried thereby, are normally held in such position that the block will grip the wire between it and the block 55 by entering a spring 62 between the end of the plate 58 and one edge face of the standard (31, the plate 58 being substantially L-shape in cross section so as to fitover the top and one. face of the standard which serves to properly guide the plate on the standard.

. tudinally E [the gripping block 55 the face of said block The block 55 is mounted in a dovetailed groove inone face of an adjustable member back and forth on the rod 69 for feeding the I wire between the gripping dies Sand 9 by pivotally attaching one end of a lever 71 to the base 68 while.the opposite end of said lever, is attached td a crank pin '72 of a disk 73, said disk being mounted upon the shaft 18, and a's'the crankpin 72 is arranged eccentrically of the.- shaft 18 the rotation of said shaft will serve to move the base 68 and parts carried thereby back and forth longi of the wire 12, and consequently will intermittently feed the wire lengthwise between the gripping dies.- Also mounted upon the base 68 and movabletherewith are a plurality of co operating rollers 74 which serve to strai hten the WIIG' 12 beforeit is fed between the gripping dies. By==providing the adjustable member 63. for car ing may be ground-from time to time to e1imi- 1 nate any tions of the.

contact with the wire, and when so ground the member 63 is adjusted outwardly sufiiciently to compensate for the ground ofi porgripping .block'. Likewise, by

. mounting the gripping block 56 in theman- Her shown, pressure may be applied to the end of the p ate 58 for moving the block 56 away from the wire so that the wire-may be removed from between the gripping blocksor a new wire entered therebetween. Fura -is mciving-ou'tthermore, when the base 68 wardly the spring 62 will yield sufficiently to permit the wire 12 to slip .between the;

gripping blocks, but as soon as the base starts its inward movement the taper of, the meeting faces of the standard 61, and the block 56, together with the-tension of spring 62, will cause said block 56 to firmly grip the wire against the block. 55, consequently the wire will 'be moved lengthwise a prescribed distance. In view of the fact, that the grip ping dies 8 and '9 hold the wire 12 against outward movement the roller 74 will straighten the wire as' the base 68 is moving on its outward stroke. 1

The operation of the device-is as follows: One end of the wire 12 is entered between the rollers- 74 .and extended between the gripping blocks 55 and 56 and betweenthe gripping dies 8 and 9. The "cutting dies 22 are then operated to sever thewire and to prepare stock at the end of the wire for ooves that might wear therein by forming the nail head. As fsoon as the cutting dies 22 move outward y the plunger 13 moves forwardly and drives the mandrel 14 against the end of the wire which is still firml held against movement by the gripping ies 8 an 9, such movement form ing a head for the next succeeding nail. As the plunger 13 makes its return stroke the gripping blocks 55 and 56 will engage the wire 12 andv move said wire lengthwise between the gripping dies 8 and 9, said dies being open at this time. At the completion of the stroke of the blocks 55 and 56 the gripping die 9 will move inwardly and lock the wire 12 against outward movement. Consequently, as the base 68 moves outwardly the gripping blocks 55 and 56 Will merely slide over the surface of the wire owing to the yielding movement of the block. 56. When the rocking lever 46 is operated to swin away from the gripping die 9 the tension of the spring 52 through the medium of thethe pivoted end thereof wire 51 will cause the die 9 to follow the thrust bar 43, thereby moving the die!) away from the die 8. As soon as the gripping .blopks 55 and 56 have moved length Wise a prescribed distance'the cutting dies .22will be swung inwardly by "the action of 'the: blocks 40 and the rollers 41 thereby severing the nail, this operation providing the pointed ends of the nail and preparing stock for formin a head on the next succeeding nail. s soon as the blocks 40 start on their return stroke the springs 42 moving them out of the and as practically all 0 the device are positive, rapidly formed.

Having thus'fully described my said in vention, what I clalmas new and desire to secure by Letters Patent is:

path of the mandrel the movements of nails-may be very. 1

will swing the cutting dies apart thereby 1. In a nail machine, a pain of wire" gripping dies; positively driven means for engaging sai at one end carrying said cutting I their opposite ends, and longitudlnally dies with a wire, a pair of'. cutting dies for severing the wire for form-N ing a nail, pairs of arms pivoted trcilgether ies at movable means for swinging the. free ends] of said arms and said cutting dles -1n wardly. g 1

2. In a nail machine, the combination with means for}- forming a nail from a section of'wi're, of means for autpmatically and intermittently moving said w1re; lengthwise, comprising apair of gripping blocks I on opposite sides of said wire,;means for adjusting one of said gripping blocks for compensating for wear thereon,fmeans for slidably mounting the opposite gm ping block, and a spring memberfor yiel ingly holding the latter-gri ping'block imposition for engagement with:- the.' wire when the blocks are moved in one direction and to have yielding action when the blocks are moved in the opposite direction.

3. In a nail machine, a pair of gripping dies adapted to engage and hold a wire against longitudinal movement, a pivotally mounted rocking lever, an arm pivoted to said lever, means for connecting one of said gripping dies with said arms, means for adjusting the movement of said arm in one direction, and means for imparting positive driving action against said rocking lever 'for swinging it in both directions.

4. In a nail machine, a pair of gripping dies for engagement with a wire, a pivotally mounted rocking lever, means for connecting one .of saidi'gripping dies with the pivoted end of said lever, a rotatable cam wheel, {and means depending from said rocking lever and passing on opposite sides of saidcam wheel whereby? the movement of said rocking lever will be Jpositive in both directions.

5. In a nail machine, a pair of cutting dies for severing the wire for forming nails, brackets carrying said cutting dies, a suporting frame or each bracket, laterally swinging arms carrying Saidframes, means' for pivoting said arms together at one end, means for adjusting the frames on said arms and means for adjusting said brackets on said supporting frames.

6. In a nail machine, a pair of gripping dies adapted to engage and hold a wire against longitudinal movement, a pivotally mounted rocking lever, a pivotally mounted arm adapted to be operated in one of its movements by said lever, means for connecting one of said gripping dies with said arm, and means for adjusting the movement of said arm in one direction.

7. In a nail machine, the combination with apairof wire gripping dies, ofapair of cutting dies for severing the wire for forming a nail, pairs of arms pivoted together at one end and carrying said cutting dies,

slidably mounted blocks adapted to be moved against the free ends of said arms for causing them to swin inwardly, and means for imparting longitudinally reciprocating movement to said blocks.

In witness whereof, I have hereunto set my hand and seal at Indianapolis, Indiana, this 13th day of NovembenA. D. nineteen hundred and twenty.

[LI s.] 

